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发表于:2017-07-08
Thisreferentialintegritycanbecheckedinoneorbothdirectionsdependingontheprojectgoal.Itisinterestingtoobservethat,whereasalldisplayquestionsareconvergent,referentialquestio...
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发表于:2019-01-05
Insemantics,conceptualmeaning(sense),alsocalledreferentialmeaning,isthecoreofmeaning.Therearetwoaspectsofwordmeaning:referentialmeaningandconnotativemeaning.Duetoitsspeci...
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发表于:2019-01-03
Primarykey,referentialintegrity,andcheckconstraints.Donotincludeanyclausesdefiningdeclarativereferentialintegrityconstraints.Thedatavolumesindatawarehousedatabasesmaketra...
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发表于:2018-03-24
Thisisthepreferentialprice.Itisstillthepreferentialprice.Ithaveisthepreferentialprice.Note:thechildrentallerthan1.2meterschargefull-rate,under1.2meterschargehalfprice,but...